Pregnancy tests and lines

[bioclock1]

How do you know if you're looking at an EVAP line or a delayed BFP??? I took 2 EPTs and 2 Equates (all tests were +/-)  These tests were all taken within 4 days of each other. The most recent two (one of each) had thin linear (going up and down) lines making a faint + sign. The oldest two (one of each) didn't have any evap lines.
Do evap lines disappear...which is maybe why the oldest tests didn't have any extra + line and the most recent two (different brands) did?
When women get faint positives is the line thick (on plus/minus tests) or can it be thin?

[Mommyof2beautifulgirls]

I had my tubes tied and cut in sept 06.  I totally regret it.  I have been on birth control since march 23rd 2008.  I am on it because of POCS.  My boobs have been hurting for about 3 weeks now, they tingle, and I am having vaginal discharge that i'm not use to.  I took ept +/- and it was a very faint pos.  I took a couple more and it was neg.  Then two days later I took another one cheap brand +/- and it was a pos and darker than the other pos.  I took a  blood test and it was neg.  I dont know what to think anymore.  They say that cyst can cause a false pos.  Evaporated lines look like a greyish color or ghostly.  You will not see blue in a evaporated line.  I wish you the best.  If I could do it all over agian i would have never gotten my tubes tied.  

[love1221]

I don't think that I've ever had an evap. line.  I've gone back and looked at tests days later also, hoping for that faint line.  The only time I've had a faint line was when I was actually pregnant.  The times when I wasn't pregnant, even if I waited weeks there was no faint line at all!

[bioclock1]

i think i wrote my post wrong. I didn't make it clear that these tests were from 4 days ago and I just looked at them today (after not looking at them at all from the time I saw negatives) and on 2 (one of each brand) I saw negatives and on the other 2 (more recent ones) I saw evap lines.
There...now do you ladies still have the same thoughts??
i hope i hope i hope!!!!

[socgirl]

Like the other poster said, take another hpt in a few days.  I would advise you though to buy a different brand test...maybe a first response early result test.  The +/- hpt's are known for having evap lines and /or false positives.  Hopefully...this is your month!!!  Lots of sticky baby dust!

[SHP]

You could be pregnant. That is what happened to me.  It got darker each day.  Sounds like you are testing really early and there is little HCG in your system.  I say check tomorrow.  There is no such thing as being a little pregnant and if there was no evaporation line from the days before then it sound like you are.  Mine stayed on the test for over a week before they started fading.  Every test is different though.